Yes, I was mostly kidding that Scientists found out only now. But we definitely need a new design. Closing the lid is ugly (someone who has always thought about invisible splashes falling up on the floor and toilet seat wouldn't think about that?). When you close the lid and flush, all those tiny little particles are sticking on the lid instead now. And when you open that again and sit, unintentionally some part of our backs (/clothes) do touch that - not helping much. Also ideally it doesn't save the toilet seat as well since even when closed the lid is still above the seat. That's why an auto-closeable inner lid that seats beneath the toilet seat is a solution (or like someone else suggested, it always remains closed but opens up only by the pressure of someone sitting on it).